These Web Sites are available to supply information about amateur radio operators. You will need the ham's call letters or full name to enable a search.
Some sites require you to register and log in before searching. Except for the FCC Site, all will supply info on both U.S. and foreign amateur radio operators.
FCC Amateur Radio License Search - If you know a Ham's name or call letters, this will return their specific FCC information. Enter names as: Last, First. Optional: Follow "First" with Middle Initial.
Radio Frequency Information - Radio Reference is a source of "assigned frequency" information. Here you can find the frequencies assigned to your local police, fire, sheriff, airport, weather, public works, etc. Their info supports digital and trunked systems as well as simplex analog operations.